4minitz/4minitz

import semver from 'semver';    // npm module
import { Meteor } from 'meteor/meteor';
import { Random } from 'meteor/random';
import { HTTP } from 'meteor/http';
import { VERSION_INFO } from '/imports/gitversioninfo';
import { ServerCollection } from '/imports/collections/server_private';
import { AdminNewVersionMailHandler } from '/imports/mail/AdminNewVersionMailHandler';

const UPDATECHECK_INTERVAL_MINUTES = 8*60;
// Make sure this instance has an anonymous server UID
let myServerID = ServerCollection.findOne({'key': 'serverUID'});
if (!myServerID) {
    myServerID = {
        'key': 'serverUID',
        'value': Random.id()
    };
    ServerCollection.insert(myServerID);
}
let myVersion = VERSION_INFO.tag;
const url = 'https://www.4minitz.com/version/updatecheck/'+myServerID.value+'/'+myVersion;
let updateCheck = function (forceReport) {
    HTTP.get(url, {}, function (error, result) {
        if (error || !result.data || !result.data.tag) {
            // Swallow silently.
            // If we can't check the version - we will not bother the admin...
            return;
        }
        let masterVersion = result.data.tag;
        let masterMessage = result.data.message;
        if (semver.lt(myVersion, masterVersion)) {
            // did we already inform about this specific masterVersion?
            let lastReported = ServerCollection.findOne({key: 'lastReportedVersion'});
            let lastReportedVersion = '0.0.0';
            if (lastReported) {
                lastReportedVersion = lastReported.value;
            }

            // only report, if forced or we have not yet reported for this new master version
            if (forceReport || masterVersion !== lastReportedVersion) {
                console.log('*** ATTENTION ***');
                console.log('    Your 4Minitz version seems outdated.');
                console.log('    Your version    : '+myVersion);
                console.log('    Official version: '+masterVersion);
                console.log('    Official message: ', masterMessage);
                console.log('    Please visit: https://github.com/4minitz/4minitz/releases');
                console.log(' ');
                ServerCollection.update(
                    {'key': 'lastReportedVersion'},
                    {'key': 'lastReportedVersion',
                        'value': masterVersion},
                    {upsert: true}
                );
                try {
                    let mailer = new AdminNewVersionMailHandler(myVersion, masterVersion, masterMessage);
                    mailer.send();
                } catch (e) {
                    console.log('Could not send \'New version exists\' eMail.');
                    console.log(e);
                }
            }
        }
    });
    Meteor.setTimeout(updateCheck, UPDATECHECK_INTERVAL_MINUTES * 60 *1000); // call myself regularly
};

// Admin may disable updateCheck by settings.json globally via:
// "updateCheck": false,
if (Meteor.settings.updateCheck !== false) {
    updateCheck(true);  // call first time at server start - with "forceReport"
}